Likely a noob update for some, but the issue stems from having not ensured that the repository/installer was loaded in proper Japanese encoding stemming from winrar.
Make sure you are forcing your Winrar to unzip using code 932.
Could you reupload, mainly just the part 2 rar in katfile.
https://www.anime-sharing.com/threads/2000-keroq-nijuuei(二重影)-fix-win10-game-voice-edition-crack.1574081/#post-6821386
Thank you for your time.